Firewire Detection

Hello

My name is Shaun Johannes.

THE PROBLEM:

I have 3 firewire audio interfaces that I use for my studio. I have a PC and run Windows XP 32-bit (Service Pack 2).

My Bitdefender 2008 on this PC expired and now the firewire interfaces are no longer detected on my PC in my device manager. Hence, my studio is crippled.

I need help desperately:-(

Thanks much...